Tire jack for recapping machines



Aug; W4. 8 R. WALKER 2,480,204;-

TIRE JACK FOR RECAPPING MACHINES Filed Sept. 27, 1946 3 Sheets-She et lugm 30, 1949. B. R. WALKER 3 3 TIRE JACK FOR RECAPPING MACHINES FiledSept. 27, 1946 3 Sheets-Sheet 2 WaZZ m" Filed Sept. 27, 1946 1949. B, R.WALKER 2,480,204

TIRE JACK FOR RECAPPING MACHINES 3 Sheets-Sheet 3 In l'eumr R. WQZZWPatented Aug. 30, 1949 ass OFFICE TIRE JACKFOR RECAPPING. MACHINESBiIl'i'RteWalker, Bertyville, AppliiiatifimSptmber 27, 194.6,Seria'!1769699136 3 Clflims. (Gilly-481 This invention relates to recapping"machines and adjuncts therefore; the invention morepaw ticularlyrelating to means for 'facilit'atihgf'the placement of "the jaws of.fafrecappin'g machine properly about a tire without pinching a'porti'onof the tire between" the "ends of the 'iaws to "be fastened together.

At .present some difficulty is "experienced" in properly. centering atire" withinrthe'secti'onal mold of lrecapping machines, because'whemthefree ends of the sections are 'broughttogether to encase the treadportion f.thtil'EfihBI'EflSA tendency. of the ti'reto compress on thefair side and to bulge considerably; at a "point where :the free ends ofthe mold sections are to be brought together. Heretofore manualdeviceshavebeen employed to exert force on thetirein the oppo= sitedirection from the bulge, soas to'reducethe bulged area of the tire andpermit the mold sections to be brought together and fastenediwith= outpinching any of the material of the tire.

The principal lobiect of the present. invention is .toprovide' apneumatic device.whleh'*can"=be readily installed in order to effect'force on the tire in a direction awayifrom thetbulg'e, .in a mannermore quickly and efllcientl'y thannneans so. far I designed and employed:1 are capable: of accomplishing.

Another object of the inventionds tO-IPIOVldG ahjack of the characterstated constructed.for use with compressed air. and with a view towardmaintaining the cost of manufacturez'ana upkeep at a minimum.

Still another object of the invention is to pro+ vide. a. .pneumaticjack-of the characterv stated which can be readily installedin arecapping machine inproper trelati'onowith' respect a tire and. operatedquickly and positively, with macti'c'all'yno utilization of manualeffort;

A further. object of the invention is to provide a jack. for. use. in.conjunction. with. recapping machines which has only one movingpart.

Still. as further object oi- .the invention. is.to .pro-

vide=a tiredeformingdack-for recapping-machines i which will not requireany modifications of: the conventional: recapping machine, thedevice'emwploying certain standard 1 construction of.- such machines forthe-purpose ofianehorage =and1stability;

Still a iurther important object ate-"provide a dependable deviceofthecharaetenstated which will-not onlycbe-substantiallwfoolproorirrallresp'ects,; .but durable-a: and..:not"* susceptible-swath}:readydevelopmentot'deiects;thisbeingiduesespoe 2... cially to the *smallnumber i of "parts that go to make upthe entire device.

These and various other objects and advantages of the invention will?become apparent to the readerofthe 'following'flescription'.

Ifrthedrawings:

Figure --1 is: a top plan view of the .de'viceshown in operatingrelatibn with'respectto-attire located within arecappirlg molds Figure-2is a section'takensubstantially oniine 2 -2- of Figure-=1."

Figure-3 is a side elevational- View "of the-device apart'fronr'ati'r'e:

Figure 4 is a bottom plan 'view of the-structure as shownirr'Fie'ure-fifi Ffgure 5 is a vertical sectional view 1 through theclevices Figure fi' is 'ra iragmentary sectional view takensubstantiallyonilineii -B of Figure 3;

Figure-"1' is asection" taken on" line 1-4 of Figure iii Figure sis =afragmentary side elevational view of the head-"or the cylinder showingthe knurled plungeri" Heferrlng=to=thedrawings; numeral 5 generallyrefers toa'mplrl which' is divided into sections 5a, 5b and ic -(seeFi'g'ure 1) these sections bein made up of a steel mold body 6 havinga'steam cavity-'1 and iocated on-an aluminum matrix I 8.

The standard i recapping: machine has a top plate (not lsh'own 1 and *alower plate 9.-

The- -lower plate consists of an'annulus e upon which a"ti'r e"toberecapped and denoted by numeral I0, is supported, the lower plate9*being supported by a hydraulic j ack or the like -'I l (only partllshown The plate9' has a'spidermade up of 'a hub lfi and: upwardly curvedarms: [3 securedto or merging with the-annulus e: In most types ofrecapping machines of this type;-the-hub I2 has an opening rl 4downwardly therethrough,

the hub*at 'its upperportion having oppositely directed slots"or-notches 15;" Mi ror selectively receivingapirror lateral lug *on thelower end: of a sh'aft' which supports-a, the usual upperplate (notshown) and this COl'lStIllCtlOIli'Of the-hub I 2 is utilized, whenemploying the improvedjack structure; making up the present inventionand whicht is' generally referred-"to by numeral 11.-

Fiure fishows that -the tire 10 has its rim l8 and that the jack IT hasits-'movable element engaging the rime or in a position-tmengage therim; while=beirig supported'by the hub [2; Following ra: description ofthe *J'ack -l 1; a description of' 'the operation zof =th'e same will begivem melanctl includes in construction a barrel [8a which is cut awayfor substantially threefourths of its length to provide an inset forreceiving the closed inner end IQ of a cylinder 20, the edges of thebarrel Illa at this cut away portion, being welded as at 2! to the endwall I!) of the cylinder 20. A tube of less diameter and denoted bynumeral 22, has one end welded as at 23 to one end of the barrel l8,while an obliquely disposed handle 24 projects from the other andreduced end of the barrel 18a in a direction adjacent to, but divergedwith respect to the cylinder 20.

The outer end of the cylinder has a remov able end wall or head 25, thishead having a skirt portion disposed into the adjacent end of thecylinder 2i] and secured by set screws 25, able leakproof means may beemployed in conjunction with the head 25. An elongatedplunger 27 extendsthrough a central opening of the head and is welded or otherwise securedto a plate 28. ,A packing cup 29 is interposed between the plate 28 anda second plate 30 and a bolt 3| is disposed through openings in theplates and packing cup 29 and is adapted to be screwed into a threadedrecess in the adjacent end of the plunger 2'! for holding the thusformed piston in assembled position as shown in Figure 5.

Extending from an opening in the end wall l9 of the cylinder 26 is asmall tube 32, which projects through another opening in the barrel l8a.The outer end of the tube 32 defines a nipple, over which a compressedair tube or conduit 33 is located and to the end that compressed air canflow to the cylinder 20.

The cylinder 20, adjacent the head 25 has a safety pressure vent 34 soas to allow for the-escape of compressed air in the cylinder, when thepiston moves to its fully extended position. The free end of the tube 22has opposite side portions flattened as at 35 and to reinforce this endof the tube, a bushing 35 is disposed into the tube, this bushing havingdiametrically opposite openings which register with diametricallyopposite openings in the tube 22, to receive a pin 31, one end of whichprojects beyond a side portion of the tube 22, to engage into one of thenotches l5, 56 of the lower plate spider hub 12. (See Figure 2.)

Some types of recapping machines have hubs l2 with larger openings l4and in such instances, a sleeve 38 on the tube 22 can he slipped down toserve as a shim in the opening I4. It is preferable that the pin 31 bewelded as at 39 to the tube 22.

Suitable packing means may be provided between the cylinder head 25 andthe plunger 21 and it is preferable that the outer end of the plunger bemilled or toothed as at 40 to prevent slippage on the inside of the rim8.

In the operation of this jack, let it be assumed, that the tire EU hasfirst been positioned on the lower plate 9, Without the jack I7, whenthe sections 5a, 5b and 5c are brought to encompassed position aroundthe tire and an effort is made to close the free ends of the sections5a, 50, these ends of the sections will pinch the tire, due to the factthat a bulged area has occurred at this portion of the tire, due to thecompressing effect of the mold throughout the remaining major portion ofthe tire.

The purpose of the jack I1 is to exert force against the tire ID at apoint substantially opposite the bulged area, shown in Figure 1. Toaccomplish this, the jack I1 is lifted from the floor or arack, by thehandle 24 and lowered Suit- 4 down through the rim I 8 with the lowerend of the tube 22 dropping into the opening I 4 of the spider l2, whichis part of the lower plate 9 of the recapping machine. The jack islowered so that the pin 31 will drop in the slot l6, which will properlyposition the jack with the gripping end 40 of the plunger 21 opposed toa point on the rim l8 opposite the bulged area of the tire, which bulgedarea will always occur just about opposite the medial point of theintermediate section 5b, and at this point pressure is to be exerted bythe Jack H.

By advancing compressed air to the cylinder 20 by way of the conduit 33and nipple 32, to exert pressure against the piston therein, the plunger21 will be forced against the rim I8 and will compress the adjacentportion of the tire [0, thus relieving the opposite portion of the tire,to the end that the bulged area will disappear and the free ends of thesections 5a, 50 can be easily closed and fastened. After this operation,air is relieved from the cylinder 20 and the jack I! removed, afterwhich the usual upper plate (not shown) is lowered onto the tire.

It is obvious, that the jack can be manufactured inexpensively, inasmuchas almost the entire structure is manufactured from tubular material andthere is only one moving part, namely the piston-plunger unit. Further,the utilization of the jack I! does not call upon the necessity ofmodifying in any Way, the conventional recapping machine.

While the foregoing description sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the claimed as new is:

1. The combination with a recapping machine including a transverselysplit mold and a rim and further including a stationary verticalstandard axially disposed within the mold and a pneumatic jack; saidjack comprising a cylinder provided with a horizontally movable pistontherein and fluid pressure inlet and outlet for the cylinder, an adapterprojecting from the cylinder and connectable with the standard andsupporting the cylinder in horizontal position, said piston providedwith an elongated plunger projecting externally of the cylinder andadapted to engage the rim tire being recapped at a point diametricallyopposite from the split of the, surrounding mold.

2. Thecombination with a recapping machine including a transverselysplit mold and a rim and further including a, stationary verticalstandard axially disposed within the mold and a pneumatic jack; saidjack comprising a cylinder provided with a horizontally movable pistontherein and fluid pressure inlet and outlet for the cylinder, an adapterprojecting from the cylinder and connectable with the standard andsupporting the cylinder in horizontal position, said piston providedwith an elongated plunger projecting externally of the cylinder andadapted to engage the rim tire being recapped at a point diametricallyopposite from the split of the surrounding mold, said adapter beingdisposed at a right angle to the cylinder and provided with a cross pinengageable in said standard.

3. The combination with a recapping machine including a transverselysplit mold and a rim and further including a stationary verticalstandinvention, What is ard axially disposed within the mold and apneumatic jack; said jack comprising a cylinder provided with ahorizontally movable piston therein and fluid pressure inlet and outletfor the cylinder, an adapter projecting from the cylinder andconneotable with the standard or supporting the cylinder in horizontalposition said piston provided with an elongated plunger projectingexternally of the cylinder and adapted to engage the rim tire beingrecapped at a point diametrically opposite from the split of thesurrounding mold, said adapter being in the form of an elongated tubeextending at right angles to the cylinder and along one end thereof andprovided with an outwardly projecting handle at one end and standardengageable means at its other end.

BILL R. WALKER.

REFERENCES CITED The following references are of record in the file ofthis patent:

5 UNITED STATES PATENTS Number Name Date 687,289 Thornton Nov. 26, 1901870,178 Johnson Nov. 5, 1907 10 1,849,078 Eckroate Nov. 15, 19321,942,368 Wilkofi Jan. 2, 1934 2,345,172 Bacon Mar. 28, 1944 2,372,644Bacon Apr. 3, 1945

